I think a lot of people spam because online without the split second reaction time its much more viable. Offline people can jab every arrow if they're skilled enough. I won't do the standstill infinite with Dedede during a friendly and flat out refuse to play on most stages with permanent walls and walk offs due to temptation to just wall infinite (unless I've been pissed off). I'll only do wall infinites and KOing chaingrabs on places like Delfino, where I believe its easy enough to avoid me for the 10 seconds its possible. That's only if the person I'm playing is competitive, or during teams. If they let me know they prefer to just play for fun. I'm much less likely to do it.
During tournaments, anything goes, but theres no reason to do certain things when nothings on the line.
My Creations in Modnation Racers! Check zhem!
http://community.modnation.com/en-us/players/IvoYaridovich/creations
